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0. B. GASTON.

'SAFBTY DEVIGE FOE ELEVATORS. NO. 288,325. Patented Nov. 13, 1883.

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NITED STATES.

" PATENT OFFEEI OLIVER B. GASTON, OF ELIZABETH, NEW JERSEY.

SAFETY DEVICE F R ELEVATORS.

SPECIFICATION forming m of Letters Patent No. 288,325, dated November 13, 1883.

Application filed August 24, 1883.

. Z all whom it 17mg] concern-.-

Be it known that I, OLIVER B. GASTON, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented a newand useful mechanical device to be'attached to elevators for the purpose of protecting life by preventing the fall of the same in case the hoisting apparatus should from any causebreak or give way, of which the,following is a specification,

My invention is. a separate arrangement hanging immediately below the elevator, but

utterly independent of it in the matter of support. Separate ropes, cables, or other suitable means hold it at a fixed distance below the bottom of the elevator. This distance may be varied to suit any special case. In the drawings a distance of three inches is shown. The

ropes or cables just mentioned. are intended to be wound orunwound by the same power that hoists the elevator, and at such a rate as shall keep invariable the desired distance between the bottom of the elevator and my device. When the accident occurs thatwould 1 brings my contrivance into play, the elevator have caused the elevator to fall, but which material usedin constructing it and the pur-.

poses for which it may be used, extending across the elevator-shaft wherever most -de-,

sirable, with the ends grooved so as to straddle the vertical notch bar and prevent it from swaying from position. Small chains or cords hold the upper or inner ends .of the weights or pawls against the bottom of the elevator. Up and down the internal walls or sides of the elevator shaft onwell, at the proper places in the-corners or centers, notched pieces or castings of iron are continuously secured.

Into these notches the lower ends of the drop or catch weightsor pawls drop (when the elevator falls) by their own weight. y

In the accompanying drawings, Figure 1 givesa view of the relative positions of the elevator and safety device. Fig. 1 represents (No model.)

may be most convenient, which pass through or outside of the elevator up to the top of the shaft. The pawls A are attached to the crossbars B by pins S, upon which they move by their own gravity, and drop into the mortises or pockets F at the same time they catch into the notches N. The pawls A are held up to the elevator by the chains 0, which hold them.

clear of the notch-bars N.

The operation is as follows: When from any cause the elevator falls, the pawls are released and drop instantly into the notches N, resting both upon the notches and pockets F in the crossbar B, thus forming a continuous support across the entire shaft or well.

, Fig. 2is a top view of the safety device.

g In Fig. 3 the arrangement of the safety de-- vice with respect to the elevator is the same as in Fig. 1, and moves and operates the same.

The weight-bolts G are attached to or suspended under the elevator with small chains, the same as in Fig. 1, and also move by their own gravity. The operation of Fig. 3 is the sameas Fig. 1, with exception of G inthe place of pawls A.

What I claim is i 1. The pawlsA, in form as shown in drawings, in combination with the cross-bar B, and in their location with respect to the elevator, for the purposes set forth, substantially as described.

2. The four. pawls A, acting by their own.

gravitation, two of which may be suspended on pins, as in Fig. 1, to the cross-bar B, and

weight-bolts two hung in slots in cross-bar B and held in position by small chains 0, attached to theele vator, separately or together, as shown.

3. The pawls A, as shown in Fig. 1, arranged so as to drop by their own gravitation in the pockets or recesses in the cross-bar B, which, when dropped, form a perfect bridge or support across the entire shaft, from notchbar to notch-bar, by a combination of two appliances which act independent of the elevator, as and for the purpose set forth.

OLlVER B. GASTON.

Witnesses:

GEORGE S. WILLTIS, Jno. LEIDBUNTROOKES. 

